Who is at fault?

Always blame the husband.

1. I think it depends on culture and family difference, in some cultures women are often blamed for leaving. They are usually told that they should endure in marriage no matter what, taking care of the children if there is any.

Fault is just sometimes is both Parties in some kind away.  It would depend on what it is about

Determining which partner is blamed more often in a divorce is complex, but research indicates that women are more frequently the ones to fie for divorce, while men often face disproportionate societal blame for the marriage’s failure.

I think men are blamed most often, but I don’t think that’s necessarily fair. It takes two to make a relationship successful and in many cases both spouses are to blame!